福建永春县刺桫椤种群结构与生命表分析

采用相邻格子法对福建永春县刺桫椤种群进行野外调查，以静态生命表和生存分析理论为基础，分析种群的生命过程，以期为刺桫椤的就地保护和经营提供指导。结果表明：刺桫椤种群年龄结构呈现基部较窄、中部较宽，顶部缺失的分布特征，存活曲线为Deevey-Ⅱ型，种群的死亡率与消失率曲线变化趋势基本一致，在Ⅵ龄级出现最高峰值，这可能与刺桫椤进入主林层过程中种内种间的竞争有关。4种生存曲线表明：刺桫椤种群具有前期稳定、中期锐减、后期衰退的特点。

Analysis on Population Structure and Life Table of Alsophila spinulosa in Yongchun County,Fujian Province

Field data of Alsophila spinulosa populations were surveyed by adopting the Adjacent Lattice Method in Yongchun County, Fujian Province, and life course of the population was analyzed based on population life table and survival analysis theory to provide guidance for the in situ protection and management of the A. spinulosa. The results showed that the population age structure was characterized with less amount of old trees, more middle aged individuals and short of young saplings. Its survival curve showed to be a Deevey-Ⅱ type. The mortality rate and recession rate changed in the basically similar way, and reached the peak at age class Ⅵ, this was probably related to the interspecific and intraspecific competition in the community when A. spinulosa grew into the major storey of the stand.